[JP] Maglev Excavation Halted in Kita-Shinagawa After Unusual Shield Machine Sounds
Source: Tokyo Shimbun
Original title:
リニア工事、北品川工区で掘進が止まっていた JR東海「7月29日にシールドマシンから通常と異なる音」
Author: Akihiro Shimada
Date: August 27, 2026, 19:01
Original language: Japanese
Web link: https://www.tokyo-np.co.jp/article/511517
Accessed: August 27, 2026
On August 27, JR Central President Shunsuke Niwa revealed excavation in the Kita-Shinagawa section of the Chuo Shinkansen maglev line’s First Capital Circle Tunnel had stopped after “[Translated quote] unusual sounds were detected from the shield machine on July 29.” Inspections are ongoing, with no recovery estimate.
The machine is near Nishishinagawa 1, Shinagawa Ward, Tokyo; no surface impact has been found. In October 2025, a road above the tunnel rose due to maglev construction, but work resumed after recurrence prevention measures.
In Machida’s Onoji section, a cutter head stopped on July 31 due to hard ground, with excavation resuming August 26 after confirming no environmental impact.
[JP] Maglev Excavation Halted in Kita-Shinagawa After Unusual Shield Machine Sounds
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Re: [JP] Maglev Excavation Halted in Kita-Shinagawa After Unusual Shield Machine Sounds
[JP] Shield Machine Stoppage in Tokyo Maglev Tunnel Construction: JR Central's Delayed Disclosure Criticized
Source: Akahata (JCP)
Original title:
リニア新幹線の掘削機停止
Date: September 12, 2026
Original language: Japanese
Web link: https://www.jcp.or.jp/akahata/aik26/202 ... 1_01_0.php
Accessed: September 12, 2026
On September 11, JCP lawmakers and local officials questioned MLIT about shield machine stoppages in the Chuo Shinkansen maglev line’s Kita-Shinagawa (9.2 km) and Onoji (12 km) sections.
MLIT explained that in Kita-Shinagawa, an unusual sound on July 29 halted excavation, with the cause under investigation; in Onoji, the machine stopped on July 31 after hitting hard ground but resumed after cutter adjustments. However, JR Central only disclosed these stoppages on August 17 and 24, respectively. Participants criticized: “[Translated quote] This is far too late. Hasn’t MLIT asked JR for an explanation?” MLIT pledged to “[Translated quote] urge JR Central for careful, appropriate responses.”
Shinagawa Ward Councilor Hiroko Suzuki also highlighted: “[Translated quote] JR Central cuts off explanation meetings after one hour, limits participants even for residents and non-partisan councilors—there’s no thorough explanation.” MLIT committed to “[Translated quote] tell JR Central to change the number limit when making requests.”
Source: Akahata (JCP)
Original title:
リニア新幹線の掘削機停止
Date: September 12, 2026
Original language: Japanese
Web link: https://www.jcp.or.jp/akahata/aik26/202 ... 1_01_0.php
Accessed: September 12, 2026
On September 11, JCP lawmakers and local officials questioned MLIT about shield machine stoppages in the Chuo Shinkansen maglev line’s Kita-Shinagawa (9.2 km) and Onoji (12 km) sections.
MLIT explained that in Kita-Shinagawa, an unusual sound on July 29 halted excavation, with the cause under investigation; in Onoji, the machine stopped on July 31 after hitting hard ground but resumed after cutter adjustments. However, JR Central only disclosed these stoppages on August 17 and 24, respectively. Participants criticized: “[Translated quote] This is far too late. Hasn’t MLIT asked JR for an explanation?” MLIT pledged to “[Translated quote] urge JR Central for careful, appropriate responses.”
Shinagawa Ward Councilor Hiroko Suzuki also highlighted: “[Translated quote] JR Central cuts off explanation meetings after one hour, limits participants even for residents and non-partisan councilors—there’s no thorough explanation.” MLIT committed to “[Translated quote] tell JR Central to change the number limit when making requests.”